The purpose of this study is to evaluate the electromagnetic emission of the overhead power line, because these power line generate electromagnetic interaction with other objects near to it. The novelty of this work shows a numerical simulation of the electromagnetic field of the 400 kV line in both permanent and transient states at different positions, based on the finite element method using numerical software. Through the results of this study, it was found that the electromagnetic field in the transient state is very important. The findings of this research can be used to evaluate the field created around transmission lines in order to determine their impact on the environment and human health.

High performance excitation systems have become very important as limited generation capacity and consumer needs for power continue to increase. This work aims to develop a robust control technique based on Hoo loop-shaping optimization method, applied to a Power System Stabilizer (PSS) to improve transient and dynamic stabilities of a turbo-alternator connected to an infinite bus system. In this paper, a robust controller is designed and simulated under MatIab-Simulink. The robust power system stabilizer (RPSS) is designed using the concept of Hoo loop shaping design which is one of the robust control methods used for designing the controllers for dynamical systems in electrical engineering. Guidance for loop shaping and synthesis of the robust controller are also presented along with the selection of the weighting functions. Comparisons are also made between the Conventional Russian power system stabilizer with a strong action (CPSS) and (RPSS). The simulation results show the effectiveness of the proposed method for a stabilizer using the concept of Roo control, by improving the performances and the robustness.

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